HUD Heads Up Display By Newsmarts - Color LED, high brightness display. - Plug and play. - Includes a hood to block glare. - Data display: driving speed / RPM/ temperature / battery voltage / mileage / automatic power on off / kmh and mph switchable. - Detects and clears car error diagnosis codes without professional equipment. - Customize your alarms to sound if the speed or water temp are too high the voltage is too low. - 4 display modes (standard mode, compact mode, competitive mode, mileage calculation). - 16 display screens, one button switch. - Boots up with car, sleeps with car.